Note: On the use of Rogowski coils as current probes for atmospheric pressure dielectric barrier discharges

Abstract

A wide bandwidth current probe based on a Rogowski coil was proposed to work down to the nanosecond time scale. It was then used to record the discharge current pulses that characterize the streamer regime of the plasma in a dielectric barrier discharge device. Indeed such plasmas are often made up of intermittent and highly localized structures such as streamers or microdischarges. Characteristics and performances of the probes are discussed together with a few results concerning their application to investigate dielectric barrier discharges and the temporal structure of different pulses of the electrical current.

Spatial and temporal evolution of microdischarges in Surface Dielectric Barrier Discharges for aeronautical applications plasmas

“…A current transducer like a Rogowski coil is suitable to measure electric current filaments. As already discussed in a dedicated paper [8], we were able to study current pulses characteristics like number, amplitude, duration and charge transported [9]. A capacitance in series with the electrode setup have been used too in order to measure the effective power absorbed by the microdischarges as well as the total charge accumulated on the dielectric surface [9].…”

“…There are several tricky aspects, including the geometry of the electrodes and the charging of the dielectric material surface facing the discharge region. In particular the asymmetry in the two portions of the discharge is considered to be essential in the production of the so called ionic wind [7][8][9].…”

Current Filaments in Asymmetric Surface Dielectric Barrier Discharge

“…Since a direct measure of the electric field or potential in the discharge region is generally not feasible, because of the perturbations it induces, the second leg of this diagnostics system is a measurement of the instantaneous value of the current flowing between the electrodes. In our experiments, this was done by means of Rogowski coil sensors [44,45].…”

“…Outside this range, however, the probe response displays a frequency-dependent attenuation and phase-shift. Thus, in order to recover the actual value of the current, an accurate calibration and a FFT decomposition of the signal is required [45]. There are some difficulties related to air core Rogowski coils, such as the variation of the coil parameters with temperature and the sensitivity to the exact location and orientation of the circuit section passing through the torus.…”

A novel design of Rogowski coil for measurement of nanosecond-risetime high-level pulsed current

“…Up to now, numerous Rogowski coils have been designed for different applications, such as pulsed current measurement, relay protection, and partial discharge monitoring. [3][4][5][6][7] These coils can be divided into self-integrating coils and differentiating coils by their operation mode. Also, the cores have two types, "air core" and "magnetic core."…”